EP 0427431 A2 19910515 - Navigation systems.
Title (en)
Navigation systems.
Title (de)
Navigationssysteme.
Title (fr)
Systèmes de navigation.
Publication
Application
Priority
GB 8925196 A 19891108
Abstract (en)
An aircraft navigation system has a digital map store 31 of terrain features or man-made features in the region over which the aircraft is flying. Infra-red television cameras 1 to 3 view the surroundings of the aircraft. Their outputs are supplied to processors 21 to 23 in which the camera outputs are compared with a library 24 of features transformed according to the camera viewing angle. Information about those features identified is supplied to a correlator 30 which correlates the features against the map store to identify their location in the map and estimates the aircraft position as an output to a navigation computer 40. The system also indicates aircraft attitude whim may be independent of known-features, from observation of the horizon. Position information can also be provided by dead reckoning from a known initial position by monitoring the change in positional relationship of a feature from the initial position to that at a later position.
IPC 1-7
IPC 8 full level
G01C 21/00 (2006.01); G09B 9/24 (2006.01)
CPC (source: EP US)
G01C 21/005 (2013.01 - EP US); G09B 9/24 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR IT SE
DOCDB simple family (publication)
EP 0427431 A2 19910515; EP 0427431 A3 19921125; EP 0427431 B1 19940907; DE 69012278 D1 19941013; DE 69012278 T2 19950105; ES 2060062 T3 19941116; GB 2237951 A 19910515; GB 2237951 B 19940427; GB 8925196 D0 19900530; GB 9023821 D0 19901212; US 5072396 A 19911210
DOCDB simple family (application)
EP 90311741 A 19901026; DE 69012278 T 19901026; ES 90311741 T 19901026; GB 8925196 A 19891108; GB 9023821 A 19901102; US 60746090 A 19901031